Preheat the oven to 300 degrees F. Line 2 baking sheets with parchment.
In a large bowl, combine the corn cereal, peanuts, pretzels, chipotle Cheddar crackers, tortilla chips, coconut, corn nuts and pepitas.
In a small saucepan, melt the butter. Add the lime zest, seasoning salt, kosher salt and chili powder. Simmer until the flavors are combined, about 1 minute. Remove from the heat and stir in the Parmesan.
Pour half the seasoning mixture over the party mix and stir to combine. Then add the second half of the seasoning mix and stir again, making sure the seasoning mixture is evenly distributed over the party mix. Divide between the 2 prepared baking sheets and bake until the mix is lightly toasted and the Parmesan is melted, about 15 minutes. Serve immediately or store in an airtight container.